Rolling Grinder

Abstract

A rolling sharpener having at least one grinding or polishing face for grinding and/or polishing a cutting tool is provided. The rolling grinder includes two rollers, a grip body arranged between the rollers and rotatable relative thereto, and a shaft rotatably supported in the grip body. To make correct operation of the rolling grinder user-friendly and to facilitate correct operation overall, each of the rollers is connected to the shaft in a frictionally engaged manner.

What is claimed is: 
     
         1 . A rolling grinder, comprising:
 a shaft;   two rollers connected to the shaft via frictional engagement;   a grip body arranged between the rollers and being rotatable relative to the rollers, the shaft being rotatably supported in the grip body; and   at least one grinding or polishing face for grinding or polishing a cutting tool.   
     
     
         2 . The rolling grinder according to  claim 1 , wherein at least one of the rollers is connected to the shaft in a frictionally engaged manner only. 
     
     
         3 . The rolling grinder according to  claim 1 , wherein the shaft or one of the rollers comprises an insertion bevel or chamfer to facilitate press-fitting. 
     
     
         4 . The rolling grinder according to  claim 1 , wherein an interference fit between the roller and the shaft is cylindrical. 
     
     
         5 . The rolling grinder according to  claim 1 , wherein at least one of the rollers has a temperature difference to the shaft. 
     
     
         6 . The rolling grinder according to  claim 1 , wherein at least one of the rollers is inserted into the shaft. 
     
     
         7 . The rolling grinder according to  claim 6 , wherein the shaft forms a female component and comprises a bore, and
 wherein each of the rollers forms a male component and comprises a support section fitting in the bore.   
     
     
         8 . The rolling grinder according to  claim 1 , wherein the grinding or polishing face is non-detachably arranged at an end face of at least one of the rollers. 
     
     
         9 . The rolling grinder according to  claim 8 , wherein the grinding or polishing face is integrally formed with the roller. 
     
     
         10 . The rolling grinder according to  claim 9 , wherein the grinding or polishing face comprises a ceramic coating. 
     
     
         11 . The rolling grinder according to  claim 1 , wherein the grip body is made of wood. 
     
     
         12 . The rolling grinder according to  claim 1 , wherein the grip body is made of oak wood, walnut wood, beech wood, or spruce wood in one piece. 
     
     
         13 . The rolling grinder according to  claim 1 , wherein the grip body is a hollow cylinder. 
     
     
         14 . The rolling grinder according to  claim 1 , wherein an outer diameter of the grip body is in the range of 50 to 60 mm. 
     
     
         15 . The rolling grinder according to  claim 1 , wherein an axial length of the grip body is in the range of 55 to 75 mm. 
     
     
         16 . The rolling grinder according to  claim 1 , wherein each of the rollers is a cylindrical disc. 
     
     
         17 . The rolling grinder according to  claim 1 , wherein each of the rollers is formed of stainless steel. 
     
     
         18 . The rolling grinder according to  claim 1 , wherein each of the rollers comprises a circumferential annular groove on a circumferential side thereof and a rubber ring fitted in the circumferential annular groove. 
     
     
         19 . The rolling grinder according to  claim 18 , wherein each of the rollers comprises a rounded or chamfered transition from the circumferential side provided with the annular groove to an end face of the roller. 
     
     
         20 . The rolling grinder according to  claim 1 , wherein an outside diameter of each of the rollers is in the range of 40 to 60 mm. 
     
     
         21 . The rolling grinder according to  claim 1 , wherein each of the rollers is connected to the shaft by press-fitting in a frictionally engaged manner,
 wherein each of the rollers is inserted into the shaft,   wherein the shaft forms a female component and has a bore, and   wherein each of the rollers forms a male component and comprises a support section fitting into the bore.   
     
     
         22 . The rolling grinder of  claim 21 , wherein an insertion bevel or chamfer is formed on said roller to facilitate said press-fitting. 
     
     
         23 . A rolling grinder comprising:
 a shaft;   two rollers connected to the shaft via frictional engagement;   a grip body arranged between the rollers and being rotatable relative to the rollers, the shaft being rotatably supported in the grip body; and   at least one grinding or polishing face for grinding or polishing a cutting tool,   wherein each of the rollers is inserted into the shaft,   wherein the shaft forms a female component and comprises a bore, and   wherein each of the rollers forms a male component and comprises a support section configured to fit in the bore.